Republicans came into this campaign believing that it would be a referendum on President Obama, and that still-high unemployment would hand them victory on a silver platter. But given the usual caveats — a month can be a long time in politics, it’s not over until the votes are actually counted, and so on — it doesn’t seem to be turning out that way.

Yet there is a sense in which the election is indeed a referendum, but of a different kind. Voters are, in effect, being asked to deliver a verdict on the legacy of the New Deal and the Great Society, on Social Security, Medicare and, yes, Obamacare, which represents an extension of that legacy. Will they vote for politicians who want to replace Medicare with Vouchercare, who denounce Social Security as “collectivist” (as Paul Ryan once did), who dismiss those who turn to social insurance programs as people unwilling to take responsibility for their lives?